Shhh! The Breck Park, despite not being awesome, is much better than people give it credit for.
I thought about Tenmile a little and am growing slightly concerned. Unless something has changed recently, REP got the project. My concern is the fact that supposedly they can't use concrete to anchor the boulders to the streambed. Now, generally the reason people claim that you shouldn't use this system of anchoring with grouting is the fish habitat argument. There is a completely unsubstantiated rumour out there that fish can't travel upstream when you anchor with contrete and riprap grouting (this isn't true; think about Golden, Salida, Lawson, etc.). Now my concern is that with a grade of 40-60 fpm, regular flows of 600-800cfs and typical peaks of 900-1500cfs, the boulders won't hold without concrete anchoring. Think about Durango (I think REP did this one too): awesome features that basically are broken every year by the high water and then fixed again in the fall. Durango is one of the few parks I know of that is not anchored with cement. Anyone have any thoughts on this?